对学生管理系统, 引入通过键盘输入学生信息、使用学号和姓名查找学生、及至少提供两种方法将学生信息(至少两位同学)写入文件，然后从文件中读取并显示信息的功能。

具体要求为：

1)键盘输入类StuKeyInput（至少支持Scanner方法，采用一行输入一个学生完整信息）2)对象序列化方法文件读写：写文件类StuSerialWrite；读文件类StuSerialRead

3)其他方法文件读写：写文件类StuWrite；读文件类StuRead

4)对2)和3)中所需的文件名通过命令行参数提供。如果文件存在，对文件按追加模式进行写操作。

5)查找类StuQuery（String key）

6)对StudentException进行修订，当出现文件不存在, 待查的学生不存在等非正常情况时，给出提示信息。-Student management system, the introduction of student information entered via the keyboard, using student number and name lookup students, and to provide at least two ways to student information (at least two students) write to a file, and then read from the file and display the information function . Specific requirements are: 1) the keyboard input class StuKeyInput (support at least Scanner method, using a line of input a student complete information) 2) object serialization method file reading and writing: write file class StuSerialWrite　reading file types StuSerialRead 3) other methods to read and write files : Write file types StuWrite　reading file types StuRead 4) for 2) and 3) the desired file name in the command line parameter. If the file exists, the file according to append mode for writing. 5) Find a class StuQuery (String key) 6) on StudentException be revised, when there is the file does not exist, does not exist for students of unknown origin and other non-normal situa